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铸态Mm（NiCoMnAlB）5+χ储氢合金的电化学性能
Electrochemical properties of as-cast Mm（NiCoMnAlB）5+χ hydrogen storage alloys
【摘要】 主要研究了硼对低钴(质量分数小于5%)储氢合金电化学性能的影响,并设计了Mm(NiCoMnAlB)5+χ(χ=0.02,0.03,0.05,0.1,0.2,0.3)一系列非化学配分铸态合金成分.结果表明,硼的加入可以提高活性和高倍率性能,但降低合金的放电容量.微观分析可知,加入硼可形成第二相,提高活性和高倍率性能.同时利用MASTER软件对合金成分进行了优化,得出最佳合金成分Mm(NiCoMnAlB)5.1,预测出新合金成分Mm(NiCoMnAlB)5.08,并用实验方法验证了性能结果.
【Abstract】 This paper studied the effect of B additive on the electrochemical properties of hydrogen storage alloys with the Co mass fraction less than 5% and designed non-stoichiometry cast alloys Mm（NiCoMnAlB） 5+χ （χ=0.02,0.03,0.05,0.1,0.2,0.3）. The results show that the activation performance and high ratio discharge property are improved,but the discharge capacity is reduced. Microstructure analysis approves that B additive in the alloys forms secondary phase CeCo4B,which can improve high ratio discharge property. Special software MASTE was used to optimize the composition. It is found when the addition of B is 0.1 in atom ratio the comprehensive properties are the best. A new alloy composition Mm（NiCoMnAlB） 5.08 was predicted,and the electrochemical properties were proved by experiment.
【Key words】 hydrogen storage alloys； cast alloys； electrochemical properties； pattern recognition； artificial neural network；
- 【文献出处】 北京科技大学学报 ,Journal of University of Science and Technology Beijing , 编辑部邮箱 ,2006年10期
- 【分类号】TG139.7
- 【被引频次】1
- 【下载频次】82